chore: Add ControlExtensions.Icon support to TextBox

Author: eriklimakc

doc/material-controls-extensions.md

@@ -9,7 +9,7 @@ Below is a summary of the icon support for different controls:
 | **Button**      |  ✔️  |     ❌     |      ❌      |
 | **Combobox**    |  ✔️  |     ❌     |      ❌      |
 | **PasswordBox** |  ✔️  |     ❌     |      ❌      |
-| **TextBox**     |  ❌  |     ✔️     |      ✔️      |
+| **TextBox**     |  ✔️  |     ✔️     |      ✔️      |
 
 
 This feature allows for the addition of icons on the supported controls. Icons can be added in different positions, such as `Icon`, `LeadingIcon`, and `TrailingIcon`. You can choose from various [`IconElement`](https://docs.microsoft.com/en-us/windows/windows-app-sdk/api/winrt/microsoft.ui.xaml.controls.iconelement)s to represent your icons, including `<BitmapIcon />`, `<FontIcon />`, `<PathIcon />`, or `<SymbolIcon />`.

src/library/Uno.Material/Extensions/ControlExtensions.cs

@@ -29,7 +29,7 @@ public static class ControlExtensions
 			"Icon",
 			typeof(IconElement),
 			typeof(ControlExtensions),
-			new PropertyMetadata(default));
+			new PropertyMetadata(default, OnIconChanged));
 
 		[DynamicDependency(nameof(SetIcon))]
 		public static IconElement GetIcon(Control obj) => (IconElement)obj.GetValue(IconProperty);
@@ -222,6 +222,14 @@ public static class ControlExtensions
 
 		#endregion
 
+		private static void OnIconChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+		{
+			if (d is TextBox textBox)
+			{
+				textBox.SetValue(LeadingIconProperty, e.NewValue);
+			}
+		}
+
 		private static void OnElevationChanged(DependencyObject element, DependencyPropertyChangedEventArgs e)
 			=> SurfaceTintExtensions.OnElevationChanged(element, (int)e.NewValue);
 

src/library/Uno.Material/Styles/Controls/v2/TextBox.xaml

@@ -467,7 +467,7 @@
 										Content="{Binding Path=(um:ControlExtensions.LeadingIcon), RelativeSource={RelativeSource TemplatedParent}}"
 										Command="{Binding Path=(um:ControlExtensions.LeadingCommand), RelativeSource={RelativeSource TemplatedParent}}"
 										Visibility="{Binding Path=(um:ControlExtensions.IsLeadingIconVisible), RelativeSource={RelativeSource TemplatedParent}}"
-										Style="{ThemeResource MaterialLeadingIconStyle}"
+										Style="{StaticResource MaterialLeadingIconStyle}"
 										HorizontalAlignment="Center"
 										Margin="0,0,16,0"
 										VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
@@ -530,7 +530,7 @@
 										Content="{Binding Path=(um:ControlExtensions.TrailingIcon), RelativeSource={RelativeSource TemplatedParent}}"
 										Command="{Binding Path=(um:ControlExtensions.TrailingCommand), RelativeSource={RelativeSource TemplatedParent}}"
 										Visibility="{Binding Path=(um:ControlExtensions.IsTrailingIconVisible), RelativeSource={RelativeSource TemplatedParent}}"
-										Style="{ThemeResource MaterialTrailingIconStyle}"
+										Style="{StaticResource MaterialTrailingIconStyle}"
 										HorizontalAlignment="Center"
 										Margin="14,0,0,0"
 										VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
@@ -702,7 +702,7 @@
 										Content="{Binding Path=(um:ControlExtensions.LeadingIcon), RelativeSource={RelativeSource TemplatedParent}}"
 										Command="{Binding Path=(um:ControlExtensions.LeadingCommand), RelativeSource={RelativeSource TemplatedParent}}"
 										Visibility="{Binding Path=(um:ControlExtensions.IsLeadingIconVisible), RelativeSource={RelativeSource TemplatedParent}}"
-										Style="{ThemeResource MaterialLeadingIconStyle}"
+										Style="{StaticResource MaterialLeadingIconStyle}"
 										HorizontalAlignment="Center"
 										Margin="0,0,16,0"
 										VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
@@ -764,7 +764,7 @@
 										Content="{Binding Path=(um:ControlExtensions.TrailingIcon), RelativeSource={RelativeSource TemplatedParent}}"
 										Command="{Binding Path=(um:ControlExtensions.TrailingCommand), RelativeSource={RelativeSource TemplatedParent}}"
 										Visibility="{Binding Path=(um:ControlExtensions.IsTrailingIconVisible), RelativeSource={RelativeSource TemplatedParent}}"
-										Style="{ThemeResource MaterialTrailingIconStyle}"
+										Style="{StaticResource MaterialTrailingIconStyle}"
 										HorizontalAlignment="Center"
 										Margin="14,0,0,0"
 										VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />